1N4734A Zener Diode 5.6V 45mA 1W DO−41 axial lead
The 1N4734A is a silicon Zener diode from the industry-standard 1N4728A-1N4758A series, specifically calibrated to provide precise 5.6V voltage regulation with 1 watt power dissipation capacity. Housed in the reliable DO-41 axial lead package, this through-hole component features a rugged construction suitable for both manual and automated assembly processes. The diode utilizes Zener breakdown phenomenon to maintain a constant voltage across its terminals when reverse-biased beyond its breakdown voltage, making it essential for creating stable voltage references in electronic circuits. With its 5% tolerance on nominal voltage (5.6V ±5%), this device offers predictable performance across various operating conditions and load currents.
This Zener diode exhibits excellent temperature stability and low dynamic impedance characteristics, ensuring consistent voltage regulation even under varying current demands. The 1N4734A is designed to handle reverse current surges up to 110mA at 8.3ms pulse width, providing robust protection against transient voltage events. The device’s 1-watt power dissipation capability, when properly heat-sinked through its leads, makes it suitable for moderate-power regulation applications. Constructed with metallurgical bonding and hermetically sealed glass or plastic package, this diode offers reliable performance across the full -65°C to +200°C operating and storage temperature range. Whether used as a shunt regulator, voltage reference, or protective clamping element, the 1N4734A delivers dependable performance in countless electronic designs requiring 5.6V regulation.
Specifications:
| Parameter | Value |
|---|---|
| Device Number: | 1N4734A |
| Zener Voltage (VZ @ IZ): | 5.32V min, 5.6V typ, 5.88V max |
| Test Current (IZ): | 45mA |
| Maximum Zener Impedance (ZZ @ IZ): | 5Ω |
| Maximum Zener Impedance (ZZK @ IZK): | 550Ω |
| Zener Knee Current (IZK): | 1 mA |
| Leakage Current (IR): | 10 μA maximum |
| Leakage Test Voltage (VR): | 2V |
| Non-Repetitive Peak Reverse Current (IZSM): | 110 mA (8.3ms pulse) |
| Power Dissipation (PD) @ TL ≤50°C: | 1.0W |
| Derating Above 50°C: | 6.67 mW/°C |
| Operating Temperature Range: | -65°C to +200°C |
| Storage Temperature Range: | -65°C to +200°C |
| Package Type: | DO-41 (Axial Lead) |
| Lead Length for Ratings: | 3/8 inch (9.5mm) |
Pinout:
| Terminal | Identification | Description |
|---|---|---|
| Cathode (K) | Banded End | Negative terminal when forward biased; connected to positive supply in reverse bias for regulation |
| Anode (A) | Non-banded End | Positive terminal when forward biased; connected to ground in reverse bias for regulation |
Applications:
- Voltage regulation circuits.
- Voltage reference sources.
- Shunt regulators for power supplies.
- Overvoltage protection circuits.
- Clamping and clipping circuits.
- Waveform shaping circuits.
- Surge suppression.
- Power supply crowbar circuits.
- Voltage limiting for sensitive components.
- Bias networks in amplifiers.
- Reference for comparator circuits.
- Analog-to-digital converter references.
- Precision voltage sources.
- Temperature compensation circuits.
- Automotive electronics protection.
- Industrial control systems.
- Consumer electronics power management.
- Telecommunications equipment.
- Battery charging circuits.
- Test and measurement equipment.
Packages:
- 1N4734A Zener Diode 5.6V 45mA 1W DO−41 axial lead.
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